Gas-mantle and method of making the same.



E. E. OTTO. GAS MAN'TL'E AND METHOD OF MAKING THE SAME APPLICATION FILED MAR.2, I912. 1,146,51 1 Q Patented July 13, 1915.

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GAS-MANTLE AND METHOD OF MAKING THE SAME.

Specification of Letters Patent.

Patented July 13,

Application filed March 2, 1912. Serial No. 68;,332.

To all whom it may concern:

. Be it known that I, EMIL E. OTTO, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and lilse'fu-l Gasdllantle and Method of Making the Same, of which the following is a specification.

My invention relates to gas mantles of the inverted type and the same consists in the -mantle itself and the method of making the same.

One object of my'invention is to produce a mantle of the inverted type which shall be comparatively simple and economical of manufacture and capable of giving the greatest possible amount of light. and avoiding the shadow incident to the usual forms or constructions of mantles.

A further object of 'my invention is to provide a simple method or process of producing this gas mantle. Heretofore various Ways have been devised to form gas mantles, among which may be mentioned that of gathering and tying the lower end of a knitted tube, and that of cutting and sewing the fabric along curved lines, but these mantles are unsatisfactory, first because of the producing of shadow by reason of the greater amount of material at the lower end, and second because of a lackoi uniformity and accuracy in the resultingproduct.

Speaking in general. te ms my new method consists, aside from the operation of impregnating With incandescing material and of burning the mantle, in taking a tube of fabric "or the like of proper length and. diameter, longitudinally infolding one end at least thereof, sewing such infolded end through all the thicknesses and then turning the tube inside out. The resulting mantle has a natural form without'the objectionable creasing and bunching incident to other.

constructions of mantles and the same, more-l over, has a smooth rounded, bottom RVlllClL cannot shrink out of shape and Which-is capable of giving a clear brilliant light through the entire mantle, the major portion of the bottom of the mantle being of a single thickness and of the natural Weave of the fabric, that is, Without eitherstretching or.

bunching. Moreover, absolute accuracy. and, uniformity of mantle is obtalned by my method, and the structure of the mantle is such that it retains its perfect shape throughout its entire period of use.

1n the drawing Figure l is a persp ctive of a mantle of my construction; i an elevation oftwo of the knitted tu 38.9 in process of manufactureinto' a mantle; Fi 3 is an end View on an enlarged scale oi one of the knitted tubes; Fig. *1: a. sectional plan on the line #4. of Fig, 1 but on a larger scale; Fig. 5 a detail section on the line 5-5 of Fig. a: but on astill larger scale; Fig. 6 an ele *ati'on of an instrument or tool employed by me for the purpose of infolding opposite sides of the knitted tube and illustrating a knit tube in position thereon and with its opposite sides so infolded; F i g. 7 a cross section on the line 7-7 of Fig. but on an enlarged scale, and F 8 is a .cross section on the line 88 of Fig. 6.

In the practice of my invention 1 out a knitted tube, of suitable diameter, into the proper lengths as illustrated at 1, 1, in Fig. 2 and in any suitable inanner-iniold the same from opposite sides, such inlolded portions being indicated at 1 in Fig. 3. These infolds extend longitudinally of the tube and While in practice I so infold such tube as to its entire length, it will be understood that it will be suiiicient it but one end there of is thus intolded. After this operation the infolded end of the tube is sewed-transversely near the extreme end as shown in Fig. 2 and through the four thicknesses produced by such infolding. The sewing is in dicated at 2 in Fig. 2.

The tube is now placed into any suitable lightgiving or incandescing solution in the usual and Well known manner and is then turned insideout and pulled over the round end of a model and dried thereon. hen, this tube is thus turned inside out there are formed the .tyvo triangular folds indicated. at 1" in Fig. 1 such folds being on the outer bottom; portion "remains perfect and undistorted andalso smooth.

The next step in the method or process 15 ,he bottom of themantle 'n'ess and'that, moreover, the, material ,or five ve-ott the tube at such, 1

to remove the mantle from the model and to apply the usual asbestos ring 3 by which the mantle is secured in the usual way onto the ring or holder -l. The mantle is then rately, I employ the instrument or tool illus-'.

trated in Fig. (3. This tool consists of two similar plates 5, 5 with their flat sides parallel to each other and secured together at their lower ends and spaced apart in suitable manner. As shown these plates are spaced apart by means of a plate or block (S and also by means of two parallel plates 7, one on each side of the block (3. These parts, together with the plates 5, are secured together in suitable manner as by means of the rivets 8. Between the space formed between the two plates 7 are pivoted the lower ends of the two similar arms 9, the pivotal points being indicated at 10. These arms are adapted to swing outwardly to the dotted line position shown in Fig. 6 and to also move inwardly toward each other" to a position between the two plates 5, it being understood that these plates are open at their upper ends. By preference these arms are held in their outward dotted line position in suitable manner, as by means of the springs 11, and the movement of these arms is limited by the contact of the inner beveled corners 9 against the lower extended end of the block (5. T he normal, position, therefore, of the tool is that indicated in Fig. (l with respect to the dotted line position of the arms 9. One of the open-ended tubes is now inserted over the two plates 5 and the arms 9 then moved inwardly with the result that the opposite sides of the tube will be accurately and perfectly infolded. The tube is now ready to be sewed in the manner hereinbefore described but in practice I prefer to simultaneously sew a plurality of these infolded tubes at the same time, in the manner indicated in Fig. 2, which shows two of such tubes which have been sewed at the same operation, the same being still connected by the thread. In practice the different tubes are of course cut apart at the proper time for the performance of the remaining steps of the process.

'liile in practice and by preference, the tube is turned inside out after being impregnated with the incandescing material, it will be understood that the time of these two operations may be reversed, that is, the tube may be so turned before the impregnating operation.

I claim:

1. The method of manufacturing gas mantles which consists in forming a tube of fabric, infolding an end of the tube longitudinally along opposite sides, sewing said tube transversely at said end to close it, impregnating the fabric with an incandescing material, turning the tube inside out, and burning the mantle.

2. The method of manufacturing gas mantles which consists in forming a seamless tube of fabric, infolding an end thereof along opposite sides, sewing said tube transversely at'said end through all the thicknesses, impregnating the fabric with an incandescing-material, turning the tube inside out, and burning the same.

3. An inverted mantle comprising a tubu lar fabric impregnated with incandescing material and formed with an open top and a closed convex bottom, said bottom having a transverse seam and two similar triangular folds, the major portion of such bottom being of single thickness.

4'.- An inverted mantle comprising a tubular fabric impregnated with incandescing material and formed with open top and closed bottom, said bottom having a transverse seam and two similar triangular folds.

An inverted mantle comprising a tubular fabric impregnated with incandescing material and formed with open top and closed bottom, said bottom having a transverse seam and two similar triangular folds whose apices substantially meetat the bottom center of the mantle.

6. An inverted mantle comprising a tubular fabric impregnated with incandescing material and formed with open top and closed. bottom, said bottom having a transverse seam and two similar triangular folds the remainder of the bottom being of single thickness and of the natural weave of the fabric.

7. An inverted mantle comprising a tubular fabric with open top and closed bottom, said bottom being formed by having its opposite sides infolded and sewed transversely and then turned inside out to form a closed bottom having two triangular folds whose apices meet substantially at the bottom center of the mantle.

EMIL E. OTTO.

Witnesses S. E. I'IIBBEN, Ronnar DOBBERMAN.

Copies of this patent may be obtained for five cents each, by addressing the Gofnmissioner of Patents, Washington, D. G. 

